CN1356959A - Device and method for controlling recovery of vapours in fuel distributor columns - Google Patents
Device and method for controlling recovery of vapours in fuel distributor columns Download PDFInfo
- Publication number
- CN1356959A CN1356959A CN00808701A CN00808701A CN1356959A CN 1356959 A CN1356959 A CN 1356959A CN 00808701 A CN00808701 A CN 00808701A CN 00808701 A CN00808701 A CN 00808701A CN 1356959 A CN1356959 A CN 1356959A
- Authority
- CN
- China
- Prior art keywords
- steam
- control
- pump
- steam recovery
- electronic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
- B67D7/0476—Vapour recovery systems
- B67D7/0478—Vapour recovery systems constructional features or components
- B67D7/048—Vapour flow control means, e.g. valves, pumps
- B67D7/0482—Vapour flow control means, e.g. valves, pumps using pumps driven at different flow rates
- B67D7/0486—Pumps driven in response to electric signals indicative of pressure, temperature or liquid flow
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A device for controlling the recovery of the vapours in fuel distributor columns (10), comprising an electronic unit (22), with which there is associated a series of reference signals, which are processed correspondingly, such as to render virtually linear the function which associates the volume of the vapour recovered by the recovery system (35) with the volume of fuel distributed, which function actually follows a non-linear development. For this reason, it is necessary to introduce a compensation curve, which, for some variables, which are determined empirically by means of prior calibration of a suction pump (26), and on the basis of a reference signal transmitted to the control unit (22), determines an actual speed of an electric motor (27) which is connected to the pump (26).
Description
The present invention relates to various fuel chargers, particularly relate to the various fuel chargers that have the system of recovering at the steam that carries out being distributed in the refueling process to automobile.
In fuel charger; particularly carrying out to various automobiles in the fuel charger of gas filed roadside; be not dispersed among the environment about every standard-required gaseous substance of safety and environmental protection; above-mentioned gaseous substance contains the compound of air and oil plant steam; and in refueling process, from the fuel tank of automobile, come out.
Distribute that the displacement effect that comes down to by the liquid that is added into fuel tank causes, it has reduced the volume more than liquid level, and discharges the gaseous substance of equivalent volume.
According to known technology, by being provided to fuel charger, the rifle with filler nozzle and suction nozzle comes suction air/gaseous substance, and said nozzle is connected to each metering volumetric pump.By being used to supply the pipeline of liquid oil plant, nozzle is connected to fuel charger, come fuel feeding by pump unit with different flow, also come suction vapor by the suction tube that is connected to metering volumetric pump, this metering volumetric pump is started according to a kind of relevant nearly flow of oiling flow of all following all the time.
According to known technology, for example, in No. the 5th, 038,838, the US Patent that proposes by same applicant or at the European patent EP-B-461 that proposes with Gilbarco company name, in No. 770, propose various systems, be used to recover various steams, promptly, air/gaseous substance, they are to come out from the fuel tank of automobile in refueling process.
For illustrate with fuel charger in steam recover relevant technical matters, let us is referring to Fig. 1, this figure relates to the fuel charger that has an independent fuel feeding rifle.
Oil plant is loaded among the subsurface tank, do not illustrate in the drawings, obtain oil plant by means of aspiration line from subsurface tank, aspiration line comprises input port 12, pump unit 13, and it is connected to fuel feeding rifle 18, and measurer 14, before via pipeline 15 oil plant being transported to disconnector 16,14 pairs of deliverys quality of measurer are measured, and the flexible pipe 17 of fuel feeding rifle 18 stretches out from disconnector 16.
The impulse deviser 20 that is connected to measurer 14 is that the oil plant of each unit (for example per 0.01 liter) of being supplied produces a pulse, this impulse singla has the frequency that is directly proportional with flow, and be sent to telltale 21, it calculates based on pulse number and shows delivery quality, and corresponding fuel feeding price.
Identical signal is sent to electronic control unit 22, its control and guiding steam recovery system.
The pipeline 17 of fuel feeding rifle 18 contains fuel feed pipe 23, and it is the extension of fuel feed pipe 15 to the fuel feeding nozzle, and a foldback pipeline 24, and it is connected to and is positioned at a near suction nozzle of fuel feeding nozzle.
This nozzle suction is from by the steam of discharging the gas filed fuel tank; In disconnector 16 the insides, foldback pipeline 24 is connected to pipeline 25, the latter is connected to the metering volumetric pump 26 that is used for suction vapor, metering volumetric pump 26 is driven by electrical motor 27, electrical motor 27 is directed to certain revolution by electronic control unit 22, this revolution is all relevant with the frequency of the impulse singla of producer 20 all the time, and with the revolution of pump 26, just the suction flow of metering volumetric pump is set up correlationship with between the flow of fuel feeding thus.
The fuel feeding of metering volumetric pump 26 reenters subsurface tank in order to the fuel charger that obtains oil plant via pipeline 28; In general, volume ratio between oil plant of being supplied and the gaseous substance that is sucked is set up and remains in the scope of each numerical value, these numerical value approach unit amount, can change this set according to the type and the various environmental conditions of gasoline.
Typically come fuel feeding, regulate flow by the operator by means of the pressure that is applied in order on the lever 30 of regulating rifle, and suction flow should all followed the variation of fuel supply flow rate all the time according to variable flow.
In fact, pulse train is all verily represented occurent fuel feeding state all the time, and the number of pulse is corresponding to delivery quality, and the frequency of pulse is then corresponding to instant flow rate; Yet, transient speed by modulating it (promptly, the revolution of per minute) guiding of the volume measurement aspirating pump that takes place, based on the instantaneous frequency of the pulse of measurer, when obtaining the end product of a constant ratio between the two volume measurement flow of fuel feeding and the steam that aspirated, or not accurate comparably.
In fact, prevailing type in order to the metering volumetric pump of recovery steam in fuel charger is vane pump, roller pump and alternative various pumps on type, they have the flow/rotation speed characteristic that is not linear fully, therefore, can not obtain a constant ratio between fuel supply flow rate and the steam that is sucked, if basic enterprising line operate at measurer/producer impulse rate, then when delivery rate changes, the number of revolution per minute of volume adjusted measuring pump linearly just.
Fig. 2 A and 2B be shown schematically in these types of using in the steam recovery system metering volumetric pump (flow/rotating speed) characteristic curve.Particularly, Fig. 2 A represents a vane pump or roller pump curve, and Fig. 2 B then represents a kind of alternative pump curve qualitatively.
In fact, these characteristic curves are illustrated in constant duty loss Δ P
1With Δ P
2(Δ P here
2＞Δ P
1) condition under, the relation of pump/Circuits System.In newly designed fuel loading system, technical matters is more complicated, therein, each fuel charger all has many nozzles, and each nozzle all is connected to different subsurface tanks, for example super lead-bearing gasoline, the unleaded gasoline of different qualities, diesel oil, or the like.
In this case, in fact, each the group rifle 18 in the same side of fuel charger 10 only has an independent nozzle to work at every turn, so that refuel, and all have a metering volumetric pump 26 at each group rifle 18 of each side to being parked in fuel charger fwd automobile.Go downstream from metering volumetric pump 26, under the situation of most of fuel feeding rifles 18, each transport pipe that is used for steam is drawn into corresponding subsurface tank is subdivided into different pipeline 28, and on each bar pipeline, each has installed an on-off system, and it comprises a series of boiler check valve, and one of them roughly is shown in Fig. 1, usually be represented as 31, it is in the downstream of pump 26.Also there is such problem, promptly, the any unbalanced of load loss appears in each branch of system, this is the result that the difference calibration situation of each valve and the different length of each branch etc. are caused, make and be used for carrying each branch of steam under identical load loss, not carry out work to oil depot, but carry out work according to different flow/speed curves, shown in Fig. 2 A and 2B.Therefore, according to different situations, metering volumetric pump 26 carries out work under different vds, and dissimilar according to oil plant under different temperatures, and are used different downstream pressure numerical value.
From above information as can be seen, under the linear relationship between the rotating speed of the electrical motor 27 of the impulse rate of producer 20 and pump 26, carry out work, can not guarantee the constant ratio between the flow of liquid phase fuel feeding and the gaseous substance that is sucked, what occurred is to deviate from this constant ratio basically.
Therefore, target of the present invention just provides and a kind ofly is used for the device that recovers at fuel charger control steam and points out corresponding method, it considers actual every service conditions, and make it to satisfy such requirement, that is, when fuel supply flow rate changes, and when oil plant (kind) or correlated condition change, between the two volume of fuel supply flow rate and the steam that is sucked, set up and keep a kind of predetermined ratio.
According to the present invention, desired technique effect is, be connected to the operation of the motor speed of metering volumetric pump simply by means of modulation, in the initial calibration stage with in the periodicity control stage, give a kind of like this ability to the steam recovery system, that is the ratio of acquisition between predetermined amount of flow and required flow.
According to device of the present invention, defined according to the basic feature in the 1st claim, its preferred or alternative each embodiment is defined in every dependent claims.
By means of an electronic control unit of suitably controlling the rotation speed change of steam aspirating pump, the method according to this invention makes between the vapor volume that is resumed and the oil plant amount of being supplied, and might obtain linear proportionate relationship; According to via electronic console, from the signal that impulse deviser obtains, change the revolution of pump.
From the explanation of a following exemplary embodiments that provides by means of non-limiting example, and, will make various features and advantage become more obvious according to apparatus and method of the present invention in conjunction with each appended schematic drawing, in all accompanying drawings:
-Fig. 1 is that the summary with fuel charger of a nozzle and gaseous substance recovery is represented;
-Fig. 2 A, 2B are two parts of cartesian coordinate map, represent the relation of flow/rotation speed characteristic qualitatively, and they relate separately to a system with vane pump or roller pump, and the system with alternative pump.Particularly, Fig. 1,2A and 2B illustrate and relate to technical matters of the present invention;
-Fig. 3 is a block scheme that is used to recover the control setup of steam according to of the present invention;
-Fig. 4 A, 4B, 4C, 4D represent to recover according to steam of the present invention the 1st embodiment of the interconnecting wiring diagram of control setup;
-Fig. 5 relates to the 2nd embodiment according to the interconnecting wiring diagram of control setup of the present invention;
-Fig. 6 represents a cartesian coordinate map, expression is when the flow in the steam recovery system changes, the qualitative relationships of ratio V/L, above-mentioned steam recovery system has an apportioning valve, one has the fixedly pump of revolution, the latter by the electrical motor of pump unit or one one independently electrical motor mechanically control;
-Fig. 7 represents a cartesian coordinate map, and expression is when the flow in the steam recovery system changes, and the qualitative relationships of ratio V/L, above-mentioned steam recovery system have electricity consumption submode pump that control, that have variable revolution;
-Fig. 8 represents a cartesian coordinate map, expression when the operation point changes, the qualitative relationships of correction numerical curve, and among its steam recovery system that can be used to be consistent with control setup according to the present invention.
In particular with reference to Fig. 3, the identical parts that once occurred in Fig. 1 all use identical reference number to represent, wherein, 35 represent to relate to a square frame of actual steam recovery system briefly, its allows the oil plant steam that distributes from automotive oil tank is recovered, and this fuel tank is by fuel feeding again, as the front has described in detail simultaneously, contiguous block of 33 expressions is used to connect from impulse deviser 20 and the signal that obtains from telltale 21 theres.
The steam volume that is resumed depends on the flow of fuel feeding, and in order to carry out this adjusting, 22 pairs of control units are from the pulse of electronic console 21 or directly detect from the pulse of impulse deviser 20, and act on the rotating speed of the electrical motor of pump 26.The steam that has recovered is transported to oil depot via flexible pipe 24, and flexible pipe 24 is coaxial with respect to the transport pipe 23 that is used for fuel feeding.Steam recovery system 35 can be used to the suction of the steam of common, super and super unleaded gasoline.
According to of the present invention one preferred but be not determinate embodiment, electronic unit 22 is by single-phase ac power supply, and it is controlling the rotating speed of brushless type electrical motor 27, therefore, equal 230V (nominal value) and the power supply voltage frequency is under the condition of 50Hz at power supply voltage, work that can satisfaction guaranted.
In fact, electronic control unit 22 receives a series of reference signals as input, these signals are correspondingly handled, and for example, it is linear function basically that the volume of the steam that system 35 is recovered becomes with the nonlinear relationship between the volume of already served oil plant.
Therefore, be necessary to introduce a compensated curve, (the previous calibration by means of each numerical value is determined for some numerical value of the speed reference signal of the input end that is sent to control unit 22, these numerical value can be provided with in the aspirating pump 26 of a reality), this compensated curve has been determined the actual speed of air extracting pump 26; The rotary speed reference signal of unit 22 by a class frequency between 0 and 200Hz between square-wave signal guide, above-mentioned square-wave signal is provided via impulse deviser 20 by electronic console 21 usually.Control unit 22 has a voltage stabilizer, therefore it can be adapted to the signal that obtains from impulse deviser 20 different amplitudes (typically be+5V is to+12V, perhaps+12V to+35V), make it can with current on market most popular various impulse devisers set up interface relationship, the output stage of impulse deviser 20 can be a NPN open collector transistor, PNP open collector transistor, totem pole type or push-pull type circuit.
Obtain each rotating speed coefficient of compensated curve by means of a kind of device, this device can automatically be determined these numerical value under different oiling flows; Alternatively, can calculate these coefficients by means of the application program that is installed in electronic processors the inside, electronic processors makes frequency limit stored 100 coefficients nearly of the rotary speed reference signal that it might change from 0 to 100Hz.
By the numerical value that obtains from micro-adjuster is increased or reduce a constant numerical value, perhaps, can also do further to revise to compensated curve by means of a coefficient that can be provided with by treater; The scope of speed adjustment can perhaps by means of treater itself, be provided with the hand of rotation of electrical motor 27 by means of a dual-in-line (DIP) switch in 20%.
Substitute as the temperature sensor of electrical motor 27 can connect a sensor that is used for measures ambient temperature.
The power level of control unit 22 has a sensor of measuring temperature, makes, just stops when temperature surpasses about 85 ℃ numerical value to electrical motor 27 supply electric energy, and the LED of display working condition lights simultaneously; This state continues, up to drop in temperature to this below limit value till.Except thermal protection, relate to the protection of maximum current in addition, when surpassing the intensity of current of predetermined value, this protection is just had an effect, interrupt the supply of electrical energy of electrical motor 27 thus, and the moving automatically supply of electrical energy that recovers in the trial of certain number of times (can be programmed to) afterwards, from minimum 1 time to maximum 8 times.
In order to communicate with electronic unit 22, be necessary to be provided with an electronic processors (Personal Computer), its minimalist configuration is as follows: 486 microprocessors, the RAM memory device of 4MB, the operating system of Windows 3.1 or later version, RS 232-RS 485 interface arrangements; And following each parameter can be set: the resolution (100/200 pulse of the every liter of oil plant) of-input pulse that produces by impulse deviser 20 via this treater; The encoder resolution of-electrical motor 27 (revolution 1 circle is 2/4/8 pulse); The hand of rotation of-electrical motor 27 (clock/anticlockwise); The speed adjustment scope of-pump 26 (in the scope of 5 to 60 liters of gasoline of per minute, being ± 20 %);-manual speed adjustment; The fixed rotating speed mode of-electrical motor 27;-speed adjustment the scope (from 5 to 60 liters of per minutes) of pump 26 under fixing revolution; Fixing or the variable revolution mode of-selection; The number of-compensating factor;-be that serial communication port distributes the address; And-the selection serial communication port.
The principal parameter that can show is (representing with the coefficient between 0 and 127): the temperature of-ambient temperature or electrical motor 27 each winding; The power level temperature of-unit 22; The frequency of-input pulse (from 0 to 200);-the impulse rate (from 0 to 200) that obtains from the coder of electrical motor 27; The part accumulative total of-oil supply (from 0 to 9999 liter);-coefficient of correction (from 0 to 120); The skew of-compensated curve (from 0 to 127, wherein numeral 64 is corresponding to 0); The position of-adjusting micro-adjuster;-the intensity of current that in electrical motor 27, flows; And-code of makeing mistakes (from 1 to 8).
The function that is used for the device that recovers at fuel charger control steam according to the present invention is as described below basically:
Find out that in order to obtain the peak efficiency of recovery system 35, control unit 22 should come control pump 26 like this, make the resume speed of gas phase corresponding to instantaneous volume at the steam that in the fuel tank gas filed operating process of an automobile, is produced.
The transient speed numerical value an of the best is determined in unit 22 for aspirating pump 26 then, nonlinear function with several variablees is provided thus, these variablees depend on one group of independent variable again, they are in response to the change at the steam volume that is produced in fuel tank gas filed process, that is, by from a matrix that is stored in a microprocessor the inside, searching cooresponding each numerical value.
Each independent variable comprises delivery rate, the volume of already served oil plant, and the time length of fuel feeding, ambient temperature, the oil plant temperature, and at any obturator of gas phase foldback pipeline 24 the insides.In control process, it is also conceivable that other each independent variable.
In order to determine the corresponding rotating speeds of aspirating pump 26, should measure the numerical value of each independent variable by means of a series of sensor and transducer instantaneously, and should send corresponding each signal that relates to each subordinate variable to control unit 22.
Particularly, owing to exist by the formed structure of each point on the flow/speed curves that relates to employed aspirating pump 26 (P/v), so will consider all related variablees; Therefore, for example, a transducer that is used for the oil plant flow sends one group of signal that is directly proportional with fuel supply flow rate to control unit 22, and each temperature transducer is the temperature of measures ambient temperature and oil plant then, and instantaneous the signal to unit 22 transmissions one proportion of composing.
Carry out the initial calibration of steam recovery system 35 by means of a sample pump 26, and come to measure the relevant function of each variable with the flow L (oil plant of being supplied) of (recovery) vapor flow rate V/ liquid by a microprocessor instantaneously, so that, in may causing the nonlinear refueling operation process of function V/L, under the condition relevant, regulate the optimum speed of electrical motor 27 with the variation of related all variablees.
Particularly, in the embodiment that relates to according to interconnecting wiring diagram control setup of the present invention, that be shown in Fig. 4 A-4D, that can see in an electronics plug-in card of steam recovery system employed 8 adaptor unions respectively connects contact pin, in Fig. 3, represent above-mentioned steam recovery system with reference number 35 usually.
Fig. 4 A represents towards each post or each the pin P1-1 of the adaptor union P1 of plug-in card, P1-2, P1-3, P1-6, P1-7, P1-8, P1-9, P1-10, P1-11, P1-12, above-mentioned plug-in card allow each electric signal to carry out the transmission of beidirectional electric signal with the coder of CPU card, LED signal diode, temperature sensor and the brushless motor 27 of impulse deviser 20 or electronic processors.In preferred rather than determinate each embodiment, the adaptor union P1 of 12 posts is vertical positive types, and for example MSTBVA 2,5/12-G-5,08.
Each post P1-1 and P1-2 allow to connect (incoming signal is respectively negative pole and positive pole) with impulse deviser 20, at P1-3, have an external pulse generator 20 power supply (14.3V, 100mA); In addition, each utmost point P1-8, P1-9 and P1-10 allow to relate to each signal (corresponding respectively to 3 spatial coordinates X, Y and Z) of the coder of electrical motor 27, post P1-11 be connected to brushless motor 27 the positive pole (6.2V) of power supply, post P1-12 is equivalent to the VREF (Voltage Reference) of a 0V.
Each post P1-6, P1-7 is respectively the VREF (Voltage Reference) of an available input end and a 0V, each pin P1-4 and P1-6 relate to the vertical column Male Connector J1 of one 6 post, AMPMODU1 280372-2 for example, and an output post of impulse deviser signal that constitutes an isolation being sent to an interface card respectively is (if there is a steam recovery system 35 that is used for the multiple product fuel charger, promptly, words at the fuel charger 10 that is used for the several fuel feeding rifles 18 of having of different product, just can use this interface card), and a post that relates to an available input.
Fig. 4 A also represents to lead to each pin P5-1 that steam recovers 4 column connector P5 of electronic cards, P5-2, P5-3, P5-4; Particularly, vertical Male Connector P5, for example AMP MODU2280371-2 allows each electric signal to carry out bidirectional transmission in the interface of RS 485 or RS 422 types or programming terminal.
Therefore, for example, post P5-1 is connected to the positive supply (5V) of this interface, and each the post P5-2 and the P5-3 that are used for input and output are connected to two lines that can carry out the two-way signaling transmission with interface, and post P5-4 is preserved for connecting with the VREF (Voltage Reference) of 0V.
Fig. 4 B represents that this snaps into each pin P2-1 of the vertical Male Connector P2 of 3 posts (for example MSTBVA2,5/3-G-5,08), P2-2, and the connection of P2-3, and to the P1-4 of adaptor union P1 and being connected of P1-5; Each post P2-1, P2-2, P2-3 allow each electric signal of output to arrive brushless motor 27, and relate to each phase of this electrical motor 27, and each post P1-4 and P1-5 allow to relate to the output of electric signal of the power supply (positive pole and negative pole) of one group of visual signal LED diode.The pin J1-5 of adaptor union J1 relates to the output signal of makeing mistakes.
Fig. 4 C represents to lead to each post P3-1 of adaptor union P3, P3-2, P3-3, P3-6, P3-7, P3-8, P3-9, P3-10, P3-11, the connection of P3-12 (P3 is a same type with adaptor union P1, and has the identical functions with adaptor union P1), and be connected (J2 is a same type with adaptor union J1, and has the identical functions with adaptor union J1) of each the post J2-4 of adaptor union J2 and J2-6.
At last, Fig. 4 D represents to lead to each pin P3-4 of adaptor union P3, and the connection of P3-5 is towards each pin J1-1 of adaptor union J1, J1-2, the connection of J1-3 is towards each pin J2-1 of adaptor union J2, J2-2, J2-3, the connection of J2-5, towards each pin J3-1 of adaptor union J3, the connection of J3-2 (belongs to the vertical positive type of 2 posts, AMP MODU1 280609-2 for example, its allows at adaptor union J1 and is used for carrying out the two-way signaling transmission between the 36V power supply of the electronic cards that steam recovers), and each the pin P4-1 that leads to adaptor union J4, P4-2, the connection of P4-3, adaptor union J4 belongs to the vertical positive type of 3 posts, and for example MSTBVA 2,5/3-G-5,0.8, because each output signal is being controlled phase place, so its mouth is connected to electrical motor 27.
Fig. 5 relates to a control conection figure at a digital brushless motor, and it shows each pin P1-1, P1-2 (each input end that relates to impulse deviser 20), P1-3, P1-4 (each mouth that relates to signal LED), P1-5, P1-6 (relating to the connection of temperature sensor), P1-7, P1-8, P1-9 (relating to other connections) towards each sensor device, and P1-10, P1-11, P4-1, P4-2 (relating to the connection of direct supply).
In addition, each pin P2-1, P2-2 and P2-3 related to towards being connected of each phase of the stator of brushless motor, each post P3-1, and P3-2, P3-3, P3-4 guarantees to lead to the connection of string line RS 485.
The function that links together with the volume (L) of already served liquid oil plant for the steam volume (V) determining to have recovered, according to number in order to each independent variable of determining function V=f (L), based on a series of observed datas that calculated by the steam recovery system that has a sample aspirating pump and preset, microprocessor 40 produces a form of each numerical value that relates to each subordinate variable, and this form is stored in one 1 and ties up or multi-dimensional matrix (being loaded among the nonvolatile memory).
Can select the scope of each independent variable possibility value like this, so that in whole refueling operation process, can cover a suitable measurable scope; In addition, microprocessor 40 uses identical numerical value tables, and in succession refueling operation each time upgrade they (numerical value).
Can select each independent variable like this, so that, come the mode of operation of emulation routine with possible best mode in the oiling stage of automotive oil tank.For this purpose, also need to provide the suitable characteristic of the capacity of employed nonvolatile memory.
Be modified to linear function V=f (L) determine be used to produce one group of signal, in order to the rotating speed of suction Controlled pump 26; At last, for more accurate control is provided.By means of a feedback unit, electrical motor 27 is connected to the microprocessor 40 of unit 22, makes that in this case feedback signal sends to microprocessor 40 from electrical motor 27, the latter can produce appropriate control signals, in order to determine at the transient speed of considering pump 26 under the condition of feedback.
In fact, when the user carried out refueling operation, 35 pairs of ambient temperature and already served oil plant volumes as variable of steam recovery system were monitored.By temperature transducer measures ambient temperature directly, and corresponding signal is sent to the microprocessor 40 of electronic unit 22, by means of a special transducer, determines the volume of already served oil plant by measuring flow; In fact, in refueling process, impulse deviser 20 sends series of pulses via telltale 21 to microprocessor 40, after the refueling operation of finishing automobile, the pulse number that microprocessor 40 will be counted stores among its internal memory, and calculates already served oil plant volume based on this number.Microprocessor 40 also continues to receive the signal that is fed back by electrical motor 27, so that obtain accurate rotating speed control to pump 26, and the deficiency of compensated linear degree.
The microprocessor 40 of electronic control unit 22, can also comprise a timer device, it measures the time gap that is experienced between twice oiling in succession, make, if this is interval greater than a special predetermined value, then relate to every experimental result and canned data (each subordinate variable) that be set on the V/L curve very inaccurate, at this moment to measure the new numerical value of each variable, and be stored among the electronic unit 22 with experimental technique.
Embodiment according to another indefiniteness of the present invention, a kind of substitute as above-mentioned solution, 120 row and the 2 a forms that are listed as or a matrix might be deposited among the electronic unit 22 with microprocessor 40, wherein the 1st row comprise each numerical value of relating to incoming frequency (between 0 and 100Hz between a frequency limit among), they are corresponding to the signal that obtains from impulse deviser 20; The 2nd row contain a series of output frequency numerical value simultaneously, and they recover 26 revolutions that should reach of pump corresponding to suction and steam.
This matrix has 120 row, and is promptly big by 20 than frequency interval 0-100Hz, so that can obtain reasonably to regulate nargin.
If there is the different downstream from system 35, then such control system makes it might proofread and correct the characteristic curve of aspirating pump 26, and the ratio V/L of whole steam recovery system 35.
This matrix is inserted into (for example eeprom memory) among the corresponding non-volatile memory device, it is integrated into microprocessor 40 the insides, even make that it still might preserve data, and can also revise data at any time under the situation of outage.
Then, by finishing this matrix from a series of data of a sample combination there acquisition of aspirating pump 26 with experimental technique, make and to obtain compensated curve by some point of interpolation (a kind of method of carrying out by a relevant electronic processors), on above-mentioned these aspects, done the test of whole steam recovery system 35.
Carry out interpolation by means of corresponding Electronic Calibration system, this Electronic Calibration system can be sent to the every result who is obtained the control unit 22 of recovery system 35.
By means of the potential device (micro-adjuster) on the electronic cards that is installed in system 35, just can regulate in question steam recovery system 35, make it and to change the curve of an acquiescence being stored in microprocessor 40 the insides, promptly, change this root curve by means of the serial port on the electronic cards of a number reportedly being delivered to recovery system 35, make it to get rid of the effect of micro-adjuster, and make a register have the function that is same as micro-adjuster.
By means of an external calibration device that is connected in the measurer, also might emulation have a series of refueling operations of different flow, its result is interpolated, so that obtain this characteristic curve, can directly obtain this curve on electronic control unit 22.
When possible variation takes place the mode of operation of steam recovery system, use the variation that can limit required significant in value (ratio V/L) according to electronic control package of the present invention; In fact, the main variation of mode of operation is because the variation of flow causes, concerning capacity was 50 liters/minute monolithic oil can, it was variable that the variation of flow can be considered between about 50 and 5 liters/minute.Obviously, the observational measurement of the numerical value of steam recovery system is to provide under operating range inner curve V/L or L/V keep constant condition as far as possible, and the objective measurement of satisfaction comprises the either large or small variation of V parameter/L, that is:
ΔV/L＝V/L|
max-V/L|
min
The every experimental result that is obtained has shown the total correctness according to system of the present invention; In fact, except steam recovery system according to the present invention, in order fast, clearly to carry out data relatively, also considered the system of two routines, that is: has a steam recovery system of the pump of variable revolution, its revolution is controlled (wherein the revolution of pump is directly proportional according to the flow of a constant of proportionality with fuel feeding) with electronic method, and one have the fixedly pump of revolution, and its revolution is controlled (wherein the revolution of pump is directly proportional according to the revolution of a constant of proportionality with electrical motor) with electrical motor with mechanical means.
The cartesian coordinate map of Fig. 6 relates to the ratio V/L observed data of (representing with percentum), according to the series of values of flow (with rising/minute representing), above-mentioned flow number obtains by a pump that has fixing revolution, controls with mechanical means.
The cartesian coordinate map of Fig. 7 additionally shows the ratio V/L observed data of (representing with percentum), according to the series of values of flow (with rising/minute representing), above-mentioned flow number obtains by the system that uses a pump that has variable revolution, controls with electronic method.
When these two parts of figure are compared, though can find out significantly, the system that use has a pump variable revolution, that control with electronic method can obtain to be better than using the performance of the system with pump fixing revolution, that control with mechanical means, but can also see, aspect the constancy of ratio V/L, can not eliminate the variation of ratio V/L in operating range by means of this system fully, as shown in the curve of the average empirical value that is obtained among Fig. 7.
Yet a back curve makes it might obtain the calibration curve of a calibration figure, and this curve can be used for according to steam recovery system of the present invention, so that make the response linearization of system.In fact, Fig. 8 represents when operation point or flow Q change, the curve of each corrected correction factors, and it can be used to according among the recovery system of the present invention: in this case, the revolution of employed pump depends on the flow of fuel feeding.
A large amount of point (about 100) that may be used to curve is assessed allows in fact system is carried out continuous linearization, provides in whole operating range correlative value V/L or L/V to carry out closed loop control thus; On the other hand, as can be seen, the recovery system of two kinds of routines all is subjected to strict restriction (seeing Fig. 6 and 7) at the two ends of operating range, and except using aforesaid nonlinear control system, under any circumstance, these restrictions all can't be corrected.
The top explanation that provides makes the every characteristic be used for the apparatus and method recovered at fuel charger control steam become obviously, and makes that following known technology to compare according to apparatus and method of the present invention has considerable advantage; At least following each point is worth mentioning :-execution speed; A result of-every result's the advantage that full accuracy-conduct obtained compares lower in use expense with known technology; And-speed that is provided with and the resolution of every controllable function.
At last, obviously, in not deviating from inventive concept of the present invention under the prerequisite of intrinsic novelty principle, can make many changes to control setup and method as theme of the present invention, and, apparent, in the embodiment of reality of the present invention, can be as required, use any material, the shape and size of the details that has illustrated, and can will usually substitute with other of technical equivalence.
Claims (27)
1. in the fuel charger (10) of single product or multiple product type, be used to control the device that steam recovers, comprise that at least one is used for the aspirating pump of steam (26), it is connected to an electrical motor (27), according to the order that obtains from an electronic control unit (22), and according to the direct and/or feedback signal that obtains from impulse deviser (20) via telltale (21), come the rotating speed of modulation electric motivation (27), it is characterized in that: described electronic unit (22) comprises the device that is used to handle a series of incoming signals, it can carry out linearization to a function that is made of a plurality of variablees, described each variable relates to the volume of the steam that is recovered by described recovery system and the volume of the oil plant supplied, described processing equipment uses at least one compensated curve, wherein, concerning most of numerical value, prior calibration by means of the empirical data of an aspirating pump (26), also by means of at least one rotary speed reference signal of the input end that mails to described electronic unit (22), determine described aspirating pump (26) actual speed.
2. according to claim 1ly be used to control the device that steam recovers, it is characterized in that: the rotary speed reference signal of described electronic unit (22) is derived by a prescription ripple signal, its frequency between 0 and 200Hz between.
3. according to claim 1 being used to controlled the device that steam recovers, and it is characterized in that: described electronic unit (22) comprises an adjuster device, and it can be adapted to from the different amplitudes of the signal of described impulse deviser (20) acquisition.
4. the device that is used to control the steam recovery according to claim 1, it is characterized in that: described compensated curve has a series of coefficient, they are automatically to obtain under different fuel supply flow rates, that is, they are calculated by means of the one section application program that is installed on the electronic processors.
5. according to claim 4 being used to controlled the device that steam recovers, and it is characterized in that: described each coefficient is stored in a memory device the inside, and each coefficient is a predetermined maximum number nearly, and the frequency limit of rotary speed reference signal changes to 120Hz from 0.
6. according to claim 1 and the 4 described devices that are used to control the steam recovery, it is characterized in that: can be by a constant numerical value that increases or reduce to obtain from micro-adjuster, perhaps, revise described compensated curve by means of a coefficient that can be provided with at described electronic processors.
7. according to claim 1 and the 6 described devices that are used to control the steam recovery, it is characterized in that: the setting range of rotating speed is in 20%, can perhaps by means of described treater, the hand of rotation of described electrical motor (27) be set by means of a dual-in-line switch.
8. according to claim 1 being used to controlled the device that steam recovers, and it is characterized in that: described electronic control unit (22) comprises an input end, and it is connected to a temperature sensor that is installed in electrical motor (27) the inside.
9. according to claim 1 being used to controlled the device that steam recovers, and it is characterized in that: described electronic control unit (22) comprises an input end, and it is connected to a sensor that is used for measures ambient temperature.
10. according to claim 1 being used to controlled the device that steam recovers, and it is characterized in that: described control unit (22) has a serial communication port, and it sets up interface relationship with electronic processors and with a calibration and diagnostic device.
11. the device that is used to control the steam recovery according to claim 10, it is characterized in that: the feasible resolution that each input pulse that is sent by described producer (20) might be set of described electronic processors, the hand of rotation of described electrical motor (27), the range of speed of described pump (26), the method that rotating speed is adjusted, the number of compensating factor, and the method for distributing the address for serial communication port.
12. in the fuel charger (10) of single product or multiple product type, be used to control the method that steam recovers, can on device, realize according to claim 1, it is characterized in that: described electrical motor (27) control is used for the rotating speed of the described pump (26) of suction vapor, its rotating speed depends on the many groups electronic control signal that receives from described electronic unit (22), above-mentioned signal is converted into the correspondent voltage signal, so that be sent to described electrical motor (27).
13. the method that is used to control the steam recovery according to claim 12, it is characterized in that: described electronic unit (22) is controlled described pump (26), make according to recovering gas phase with the corresponding speed of instantaneous volume of the steam that in the refueling operation process, is produced, and described electronic unit (22) is by means of a series of sensor and transducer, from the transient measurement value of described each independent variable, determine to have several independent variables a nonlinear function, come to determine at least a transient speed numerical value for described pump (26), corresponding each signal that relates to described each variable is sent to described electronic control unit (22).
14. the method that is used to control the steam recovery according to claim 12, it is characterized in that: use the numerical value of a plurality of independent variables to realize the initial calibration of a sample aspirating pump (26), and determine in preset time unit, a function between the flow of flow that recovers steam and the oil plant supplied is so that correspondingly regulate the rotating speed of described electrical motor (27).
15. the method that is used to control the steam recovery according to claim 13, it is characterized in that: described function is linearized, and by means of a microprocessor (40), based on using a sample aspirating pump (26) and presetting and a series of observed datas of calculating, determine this function, generate a form of the numerical value relate to described each subordinate variable thus, this form is stored among 1 dimension or multi-dimensional matrix that electronic memory comprises.
16. the method that is used to control the steam recovery according to claim 15, it is characterized in that: each independent variable is all got the predetermined number range that can select, from a refueling operation to next time the refueling operation, these numerical value are upgraded.
17. the method that is used to control the steam recovery according to claim 16, it is characterized in that: described electrical motor (27) and described microprocessor (40) are connected among the feedback control loop, make feedback signal be sent to microprocessor (40) from described electrical motor (27), described microprocessor (40) produces various control signals, and the latter can determine the transient speed of described aspirating pump (26).
18. control the method that steam recovers according to claim 14 and 17 described being used to, it is characterized in that: described each variable comprises ambient temperature and the volume of having supplied oil plant.
19. according to claim 12 and the 18 described methods that are used to control the steam recovery, it is characterized in that: in refueling process, described producer (20) sends a series of pulses via telltale (21) to microprocessor (40), institute reached a pulse number of number when microprocessor (40) was being stored and is being equivalent to refueling operation and finishes, so that the volume of oil plant has been supplied in calculating.
20. according to claim 15 being used to controlled the method that steam recovers, and it is characterized in that:
Described microprocessor (40) comprises at least one timer device, the time gap of its energy measurement between twice refueling operation in succession, make, if this is interval greater than a specific predetermined value, then measure the further numerical value of described variable, and it is deposited among the electronic unit (22) with experimental technique.
21. the method that the control steam recovers that is set forth in that is used in according to claim 12, it is characterized in that: in described microprocessor (40) the inside of described electronic unit (22), a at least form or a matrix have been stored, comprising the numerical value that relates to the one group of corresponding incoming frequency of signal that obtains from described impulse deviser (20), and relate to numerical value with the corresponding output frequency of multiple working speed of described aspirating pump (26).
22. the method that is used to control the steam recovery according to claim 21, it is characterized in that: described matrix comprises many row, make it to obtain suitable adjusting nargin, so that under the condition of appearance, proofread and correct the characteristic curve of described aspirating pump (26) and the ratio (V/L) of described steam recovery system (35) from the different downstreams of described system (35).
23. the method that is used to control the steam recovery according to claim 21, it is characterized in that: described matrix is placed among the non-volatile memory device, the latter is integrated into described microprocessor (40) the inside, make, even under the situation of outage, still the data that contained can be kept, and data can be revised at any time.
24. the method that is used to control the steam recovery according to claim 21, it is characterized in that: described matrix comprises a data sequence that obtains with experimental technique from a sample sequence of described aspirating pump (26), make, just can obtain a compensated curve by a series of point of interpolation, the each point that the premises is just tested steam recovery system (35).
25. the method that is used to control the steam recovery according to claim 24, it is characterized in that: carry out described interpolation by means of a corresponding Electronic Calibration system, above-mentioned Electronic Calibration system can be sent to the every result who is obtained described electronic control unit (22).
26. the method that is used to control the steam recovery according to claim 22, it is characterized in that: obtain described adjusting by means of at least one potential device, this potential device makes might change a predetermined curve that is stored in described microprocessor (40) the inside, promptly, by means of a serial port that one group of data is sent to described steam recovery system (35), change described predetermined curve, perhaps get rid of described potential device, use a register with the function that is same as described potential device.
27. the method that is used to control the steam recovery according to claim 21, it is characterized in that: it comprises by means of being connected at least one a calibrating installation measurer, outside described steam recovery system (35), carry out the simulation stage of a series of refueling operations with different flow, every result of described emulation is interpolated, so that obtain a characteristic curve of described system (35), this curve can directly be applied to described electronic control unit (22).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1999MI001292A ITMI991292A1 (en) | 1999-06-10 | 1999-06-10 | DEVICE AND PROCEDURE FOR THE CONTROL OF THE VAPOR RECOVERY IN THE COLUMNS OF THE FUEL DISTRIBUTORS |
| ITMI99A001292 | 1999-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1356959A true CN1356959A (en) | 2002-07-03 |
Family
ID=11383143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00808701A Pending CN1356959A (en) | 1999-06-10 | 2000-06-06 | Device and method for controlling recovery of vapours in fuel distributor columns |
Country Status (19)
| Country | Link |
|---|---|
| EP (1) | EP1192102B1 (en) |
| KR (1) | KR20020014811A (en) |
| CN (1) | CN1356959A (en) |
| AR (1) | AR024311A1 (en) |
| AT (1) | ATE250004T1 (en) |
| AU (1) | AU5812300A (en) |
| BR (1) | BR0011395A (en) |
| CZ (1) | CZ20014332A3 (en) |
| DE (1) | DE60005348T2 (en) |
| ES (1) | ES2206266T3 (en) |
| HU (1) | HUP0201523A2 (en) |
| IT (1) | ITMI991292A1 (en) |
| MX (1) | MXPA01012822A (en) |
| PL (1) | PL353022A1 (en) |
| RU (1) | RU2250195C2 (en) |
| SK (1) | SK17802001A3 (en) |
| TR (1) | TR200103554T2 (en) |
| TW (1) | TW464627B (en) |
| WO (1) | WO2000076909A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101450780B (en) * | 2007-12-05 | 2013-01-02 | 托克海姆控股有限公司 | Fuel distributing device with vapor recovery device and method using the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2955658B1 (en) * | 2010-01-25 | 2012-11-02 | Tokheim Holding Bv | DEVICE FOR GAUGING A LIQUID FUEL DISPENSING APPARATUS AND METHOD USED IN THE USE OF SUCH A DEVICE |
| TR201821398A2 (en) * | 2018-12-31 | 2020-07-21 | Mepsan Petrol Cihazlari San Ve Tic A S | INTELLIGENT STEAM RECYCLING PUMP SYSTEM |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1228284B (en) | 1989-01-04 | 1991-06-07 | Nuovo Pignone Spa | IMPROVED SYSTEM FOR SAFE STEAM RECOVERY, PARTICULARLY SUITABLE FOR FUEL DISTRIBUTION SYSTEMS |
| US5040577A (en) | 1990-05-21 | 1991-08-20 | Gilbarco Inc. | Vapor recovery system for fuel dispenser |
| DE4200803A1 (en) * | 1992-01-15 | 1993-07-22 | Riba Prueftechnik Gmbh | Sucking gas from liquid connector and feeding back to control vehicle refuelling fuel=air mixture - involves measuring pressure drop in feedback line, using difference between actual and demand vol. flow to control vol. flow. |
| US5542458A (en) * | 1994-08-22 | 1996-08-06 | Gilbarco Inc. | Vapor recovery system for a fuel delivery system |
| US5868175A (en) * | 1996-06-28 | 1999-02-09 | Franklin Electric Co., Inc. | Apparatus for recovery of fuel vapor |
| FR2777878B1 (en) * | 1998-04-24 | 2000-06-30 | Schlumberger Ind Sa | METHOD FOR RECOVERING VAPORS EMITTED DURING A DISPENSING OF LIQUID |
-
1999
- 1999-06-10 IT IT1999MI001292A patent/ITMI991292A1/en unknown
-
2000
- 2000-06-06 MX MXPA01012822A patent/MXPA01012822A/en unknown
- 2000-06-06 AT AT00943776T patent/ATE250004T1/en not_active IP Right Cessation
- 2000-06-06 DE DE60005348T patent/DE60005348T2/en not_active Expired - Fee Related
- 2000-06-06 KR KR1020017015856A patent/KR20020014811A/en not_active Application Discontinuation
- 2000-06-06 CZ CZ20014332A patent/CZ20014332A3/en unknown
- 2000-06-06 SK SK1780-2001A patent/SK17802001A3/en unknown
- 2000-06-06 PL PL00353022A patent/PL353022A1/en not_active Application Discontinuation
- 2000-06-06 EP EP00943776A patent/EP1192102B1/en not_active Expired - Lifetime
- 2000-06-06 AU AU58123/00A patent/AU5812300A/en not_active Abandoned
- 2000-06-06 TR TR2001/03554T patent/TR200103554T2/en unknown
- 2000-06-06 RU RU2001132562/12A patent/RU2250195C2/en not_active IP Right Cessation
- 2000-06-06 CN CN00808701A patent/CN1356959A/en active Pending
- 2000-06-06 BR BR0011395-6A patent/BR0011395A/en not_active IP Right Cessation
- 2000-06-06 HU HU0201523A patent/HUP0201523A2/en unknown
- 2000-06-06 WO PCT/EP2000/005234 patent/WO2000076909A1/en not_active Application Discontinuation
- 2000-06-06 ES ES00943776T patent/ES2206266T3/en not_active Expired - Lifetime
- 2000-06-07 AR ARP000102827A patent/AR024311A1/en active IP Right Grant
- 2000-06-14 TW TW089111602A patent/TW464627B/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101450780B (en) * | 2007-12-05 | 2013-01-02 | 托克海姆控股有限公司 | Fuel distributing device with vapor recovery device and method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| PL353022A1 (en) | 2003-10-06 |
| DE60005348T2 (en) | 2004-07-08 |
| AR024311A1 (en) | 2002-09-25 |
| ATE250004T1 (en) | 2003-10-15 |
| HUP0201523A2 (en) | 2002-08-28 |
| SK17802001A3 (en) | 2002-10-08 |
| EP1192102B1 (en) | 2003-09-17 |
| KR20020014811A (en) | 2002-02-25 |
| BR0011395A (en) | 2002-03-05 |
| EP1192102A1 (en) | 2002-04-03 |
| TR200103554T2 (en) | 2002-05-21 |
| DE60005348D1 (en) | 2003-10-23 |
| CZ20014332A3 (en) | 2002-05-15 |
| AU5812300A (en) | 2001-01-02 |
| ITMI991292A1 (en) | 2000-12-10 |
| RU2250195C2 (en) | 2005-04-20 |
| ES2206266T3 (en) | 2004-05-16 |
| WO2000076909A1 (en) | 2000-12-21 |
| ITMI991292A0 (en) | 1999-06-10 |
| TW464627B (en) | 2001-11-21 |
| MXPA01012822A (en) | 2003-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104528627B (en) | A kind of self-alignment fuel charger variable frequency oil gas recovery control system of gas liquid ratio and method | |
| CN102869575A (en) | Vapor recovery pump regulation of pressure to maintain air to liquid ratio | |
| CN1084485A (en) | The improved system for effective vapour recovery of no packing element in the bunkering facilities | |
| US20060169035A1 (en) | Method for detecting the fuel quantity during the refuelling of a motor vehicle | |
| CN1356959A (en) | Device and method for controlling recovery of vapours in fuel distributor columns | |
| CN1216947A (en) | Oil injection apparatus and method for polymer processing | |
| US7831399B2 (en) | Method for determining the gas volume flow in gas recirculation at a filling station | |
| CN202755241U (en) | Fueling injection equipment of steel wire rope strand | |
| US5992474A (en) | Device for dispensing liquid fluids | |
| CN202687941U (en) | Variable frequency oil gas recycling control system of fueling machine | |
| CN103206313A (en) | Method and system for controlling oil injection quantity of engine | |
| CN1079898C (en) | Process for operating a fuel injection device | |
| CN210003397U (en) | electric spraying type mist sprayer | |
| CN102718178B (en) | Variable-frequency oil gas recovery control system of fuel dispenser | |
| CN201485073U (en) | Integrated pulse air conveyer | |
| CN210261094U (en) | Oil gas recovery on-line monitoring device | |
| CN203859181U (en) | Storage battery acid filling positioning device | |
| CN1450257A (en) | System and method for delivering combustible liquids | |
| CN208919700U (en) | A kind of welding gas filling equipment can be automatically controled synergist additive amount | |
| CN210163115U (en) | Automatic accurate oil pumping system | |
| CN204848218U (en) | Simple and easy oral liquid caging machine | |
| CN107664067A (en) | Single cylinder common rail diesel engine | |
| PL300000A1 (en) | Automobile fueling apparatus with gasoline vapour return effected by means of a motorized gas pump | |
| CN202322354U (en) | Computer measuring oil filling system from diesel locomotive | |
| HU213718B (en) | Gazoline-filling station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |